If it is Chipmunk that you are after and not the problem to use the C module in Delphi, then I'd like to point you to a thread at DanJetX forums, where a user named "Light" compiled the Chipmunk physics library into a small DLL and currently writes a Delphi wrapper to easily use it.

He also posted a demo which shows some of the very nice Chipmunk features.

I guess he will update this soon and finally posts source code (currently only demo exe and dll)

You might also want to directly contact him at the forums.

Here is the link:
http://www.ericbehme.de/phpBB2DAN/viewtopic.php?t=506